<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
  <input type="text" placeholder="用户名" v-model="user.username">
  <input type="text" placeholder="密码" v-model="user.password">
  <input type="text" placeholder="昵称" v-model="user.nickname">
  <input type="button" value="注册" @click="reg()">
</div>
</body>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<script>
  let v = new Vue({
    el:"body>div",
    data:{
        user: {username: "", password: "", nickname: ""}
    },
    methods:{
      reg() {
        axios.post("/user/reg", v.user).then(function (response) {
            if (response.data == 1) {
                alert("注册成功！");
                location.href = "/";
            } else {
                alert("用户名已存在！");
                location.reload();
            }
        })
      }
    }
  })
</script>
</html>